<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style>
	div {
				display: flex;
				width: 600px;
				height: 300px;
				background-color: red;
			/* 	flex-direction: column;
				flex-wrap:wrap; */
				flex-flow: row wrap;
			}
	
			div span {
				width: 150px;
				height: 100px;
				background-color: blue;
				color：#fff;
				margin-right: 10px;
			}
		</style>
	</head>
	<body>
		<div>
			<span>1</span>
			<span>2</span>
			<span>3</span>
			<span>4</span>
			<span>5</span>
		</div>
	</body>>
</html>